royfurr: Yeah, it does make sense to have incremental changes (hey, that's how I started!), but one reason I did the changes I did was because I realized one unforeseen consequence was actually quite good. Bombard units can knock a ship down so low that they are as good as dead. If you knock a ship down to 1 HP right now, even an elite has a small chance of being destroyed, or at least hurt badly - each "bad roll" is 20% of an elite ship's HPs! In my system, that ship at 1 HP has almost no chance even against a conscript ship (8 HP)! And if a few rolls go by that damage the attacker, it's still barely gonna scratch him at veteran/elite (16/20HP). That's one of the reasons I can't go back to just minimal changes
Another unforeseen consequence is that your units heal more HP, though it's the same percentage. Instead of 1 HP per "rest" turn, it's now 4. That's good, because otherwise you could be waiting 19 years to heal an elite tank
One bad thing that comes of this, though, is that bombard units can destroy terrain improvements almost every time they try, and it also seems much easier to hit cities as well... I guess a lot of people complained that it was too hard to hit cities, so some may like that aspect, but I may modify city bombard defense or something to change it...
I certainly like your ideas though, and I will eventually change the attack and defense of my units to reflect their era... and I really think it would be great to be able to modify HP per era. Even if it were just a "age modifier" bonus, where all units of a particular era had a HP modifier. That would be great! Ancient = 100%, Middle = 150%, Industrial = 200%, Modern = 300%. That right there would practically be my system but set up to where an elite warrior (5 HP) could almost NEVER take even a conscript modern armor (at 300% that'd be 6HP compared to 2HP today).